The car fridge is usually powered by one of three main sources: 12V, 24V and 230V. The 12V power supply is usually sourced from a car socket (cigarette lighter), which is standard in many cars, caravans and small vans. 24V power is usually for larger vehicles such as trucks, lorries or buses where a 24V system is standard. 230V power is usually for home use or for camping and caravan sites where an alternating current (AC) connection is available. Car refrigerators can often have multiple power options for flexibility and convenience.